damoxc · September 22, 2011 13:08 · Sep 22, 2011
diff --git a/create-thumbnails b/create-thumbnails
@@ -0,0 +1,75 @@
+#!/bin/bash
+
+parse_time() {
+    IFS=' ' read -ra PART <<< "$1"
+	seconds=0
+    for i in "${PART[@]}"; do
+		number=$(expr match $i '\([0-9]\+\)')
+		unit=$(expr match $i '[0-9]*\([a-z]\+\)')
+		case $unit in
+			h)
+				seconds=$(($seconds+$(($number*3600))))
+				;;
+			mn)
+				seconds=$(($seconds+$(($number*60))))
+				;;
+			*)
+				seconds=$(($seconds+$number))
+				;;
+		esac
+    done
+	echo $seconds
+}
+
+pretty_time() {
+	seconds=$1
+	hours=$(($seconds / 3600))
+	seconds=$(($seconds % 3600))
+	minutes=$(($seconds / 60))
+	seconds=$(($seconds % 60))
+
+	printf "%02d:%02d:%02d" $hours $minutes $seconds
+}
+
+genthumb() {
+	VIDEO="$1"
+	NAME=${VIDEO%.*}
+
+	# Generate the media info
+	mediainfo "$VIDEO" > $NAME.txt
+
+	SECS="$(parse_time "$(grep -m 1 Duration $NAME.txt | cut -d: -f2)")"
+	STEP=$(echo "($SECS / 4) - ($SECS / 4 * 0.1 / 1)" | bc)
+
+	# Generate the thumbnails
+	mplayer -quiet -vo jpeg -ss $STEP -sstep $STEP -frames 4 "$VIDEO"
+
+	# Find out the width of the thumbnails
+	WIDTH=$(identify -format %w 00000001.jpg)
+	HEIGHT=$(identify -format %h 00000001.jpg)
+
+	# Annotate the images
+	for i in `seq 1 4`; do
+		TIME=$(pretty_time $(($STEP*$i)))
+		convert -background '#0008' -fill white -gravity south-east \
+			-font /usr/share/fonts/TTF/DejaVuSans.ttf \
+			-size "55x14" \
+			caption:"$TIME" "0000000$i.jpg" \
+			+swap -gravity south-east -composite "0000000$i.jpg.tmp"
+		mv "0000000$i.jpg.tmp" "0000000$i.jpg"
+	done
+
+	# Generate the tiled image
+	montage -font /usr/share/fonts/TTF/DejaVuSans.ttf \
+		-border 0 -geometry ${WIDTH}x -tile 2x2 \
+		0000000{1,2,3,4}.jpg ${NAME}.jpg
+
+	# Generate the header
+
+	# Remove the tiles
+	rm 0000000{1,2,3,4}.jpg
+}
+
+for ARG in "$@"; do
+	genthumb "$ARG"
+done;